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Uses the union of all drive statuses to determine Drive::Controller's preferred clocking.

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This commit is contained in:
Thomas Harte 2020-02-12 22:28:42 -05:00
parent 452e281009
commit 3cb6bbf771
2 changed files with 29 additions and 6 deletions
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28
Storage/Disk/Controller/DiskController.cpp
View File

@ -16,6 +16,7 @@ Controller::Controller(Cycles clock_rate) :
pll_(100, *this),
empty_drive_(int(clock_rate.as_integral()), 1, 1),
drive_(&empty_drive_) {
empty_drive_.set_clocking_hint_observer(this);
set_expected_bit_length(Time(1));
}
@ -24,11 +25,24 @@ void Controller::set_component_prefers_clocking(ClockingHint::Source *component,
}
ClockingHint::Preference Controller::preferred_clocking() {
return (!drive_ || (drive_->preferred_clocking() == ClockingHint::Preference::None)) ? ClockingHint::Preference::None : ClockingHint::Preference::RealTime;
// Nominate RealTime clocking if any drive currently wants any clocking whatsoever.
// Otherwise, ::None will do.
for(auto &drive: drives_) {
if(drive.preferred_clocking() != ClockingHint::Preference::None) {
return ClockingHint::Preference::RealTime;
}
}
if(empty_drive_.preferred_clocking() != ClockingHint::Preference::None) {
return ClockingHint::Preference::RealTime;
}
return ClockingHint::Preference::None;
}
void Controller::run_for(const Cycles cycles) {
if(drive_) drive_->run_for(cycles);
for(auto &drive: drives_) {
drive.run_for(cycles);
}
empty_drive_.run_for(cycles);
}
Drive &Controller::get_drive() {
@ -77,14 +91,19 @@ void Controller::set_drive(int index_mask) {
}
ClockingHint::Preference former_prefernece = preferred_clocking();
// invalidate_track();
// Stop receiving events from the current drive.
get_drive().set_event_delegate(nullptr);
get_drive().set_clocking_hint_observer(nullptr);
// TODO: a transfer of writing state, if writing?
if(!index_mask) {
drive_ = &empty_drive_;
} else {
// TEMPORARY FIX: connect up only the first selected drive.
// TODO: at least merge events if multiple drives are selected. Some computers have
// controllers that allow this, with usually meaningless results as far as I can
// imagine. But the limit of an emulator shouldn't be the author's imagination.
size_t index = 0;
while(!(index_mask&1)) {
index_mask >>= 1;
@ -94,7 +113,6 @@ void Controller::set_drive(int index_mask) {
}
get_drive().set_event_delegate(this);
get_drive().set_clocking_hint_observer(this);
if(preferred_clocking() != former_prefernece) {
update_clocking_observer();

7
Storage/Disk/Controller/DiskController.hpp
View File

@ -55,16 +55,21 @@ class Controller:
void set_drive(int index_mask);
/*!
Adds a new drive to the attached list, returning its index.
Adds a new drive to the drive list, returning its index.
*/
template<typename... Args> size_t emplace_drive(Args&&... args) {
drives_.emplace_back(std::forward<Args>(args)...);
drives_.back().set_clocking_hint_observer(this);
return drives_.size() - 1;
}
/*!
Adds @c count new drives to the drive list, returning the index of the final one added.
*/
template<typename... Args> size_t emplace_drives(size_t count, Args&&... args) {
while(count--) {
drives_.emplace_back(std::forward<Args>(args)...);
drives_.back().set_clocking_hint_observer(this);
}
return drives_.size() - 1;
}